Keystone Auth UI — Desktop Sign Up (Focus)

A desktop split-panel authentication UI composition from the Keystone Auth UI Kit. The left panel presents a clean sign-up card with Google and Apple OAuth buttons, a full registration form (name, email, password with live strength indicators, password confirmation), password visibility toggles, terms-of-service checkbox, an indigo primary CTA, and a login link with footer. The right panel features a dark abstract purple-orange visual with a bold 'Build faster. Ship smarter.' headline and supporting brand copy.